5965-4792.pdf - 第7页
3. Freq uency , DC bias, and ope r at in g temperatu re/ h umi dit y each o f the Key sight ac ce sso ries h as it s own s peci fic o pera ting ra nge. Any m easur ement per for med ou tsi de this ra nge ca n incre ase r…
The following topics comprise a helpful guideline for selecting an appropriate accessory
for the measurement instrument to be used.
1. Selection by measurement application
Keysight accessories can be used in a wide variety of measurement applications. These
applications range from basic measurements (such as impedance measurements for
discrete devices) to advanced measurements (such as measurement of resistivities or
dielectric constants.)
2. Compatibility with measurement instruments
Test fixtures/leads are compatible with the measurement instruments when they have
the same type of terminal configuration and useable measurement frequency range. The
measurement instruments described in this guide are divided into the following three
categories based on frequency.
Tips for Selecting Appropriate Accessories
Frequency Up to 120 MHz Up to 3 GHz
range (Terminal configuration: 4-Terminal pair) (Terminal configuration: 7 mm)
Measurement E4980A/AL, E4981A, E4990A E4982A, E4990A + 42942A*, E4991B,
instruments E5061B-3L3/3L4/3L5 w/Opt. 005 + 16201A
* Option E4990A-120 is required.
03 | Keysight | Accessories Catalog for Impedance Measurements - Catalog
3. Frequency, DC bias, and operating temperature/humidity
each of the Keysight accessories has its own specific operating range. Any measurement
performed outside this range can increase residual errors and can cause problems. Be
sure that your measurement environment fits the accessory’s specific operating range.
In the case of humidity, Keysight’s accessories can operate at a relative humidity of 95%
or less at 40°C. (These same requirements apply to most LCR Meters and Impedance
Analyzers.) When the ambient temperature is not approximately 40°C, use an accessory
that has no condensation on its surface.
4. DUT (device under test) dimensions
The DUT can vary from chip components, axial/radial leads, or ICs to general electrical
materials. Select a test fixture/lead that is suitable for the shape and size of your
components or materials.
5. Open & short repeatability and proportional error
Since a test fixture induces an additional error when measuring, the total measurement
error is the sum of the measurement instrument’s measurement accuracy and the
fixture’s additional error. Generally, a test fixture’s additional error consists of three
terms: open repeatability, short repeatability and proportional error. Open and short
repeatability exhibit the error factors of the open and short residual impedances which
affect the measurements of extremely high and low impedances respectively. Propor-
tional error exhibits the error factor, which is proportional to the value of the impedance
being measured. For more details on this subject, please refer to the Appendix.
6. Furnished accessories
Each test fixture is shipped with a manual and various other accessories needed for
measuring. For example, the 42941A impedance probe kit is furnished with a pin probe,
an adapter (BNC-SMA), 3 spare pins, a carrying case and an operation and service
manual.
Tips for Selecting Appropriate Accessories continued
04 | Keysight | Accessories Catalog for Impedance Measurements - Catalog
Tips for Selecting Appropriate Accessories continued
7. Terminal adapters
Terminal Adapters convert the instruments terminal configuration into a 7 mm terminal configura-
tion. This means that instruments that do not have a 7 mm terminal connector can use test
fixtures with a 7 mm terminal connector. The 42942A converts a 4-Terminal Pair configuration
into a 7 mm terminal connector, which can only be used with the E4990A*.
42942A Terminal adapter
Dimensions (approx.):
190 (W) x 55 (H) x 140 (D) [mm]
Weight (approx.): 800 g
Applicable instrument: E4990A*
Frequency: 20 Hz to 120 MHz
Maximum voltage: ±42 V peak max. (AC +DC)
Operating temperature: 0to 40°C
Furnished accessories:
Options:
42942A-700: Add 7 mm open/short/load set
Description P/N Qty.
Carrying case 42942-60011 1
Operation and service manual 42942-90020 1
* Option E4990A-120 is required
Description P/N Qty.
Open termination 04191-85302 1
Short termination 04191-85300 1
Load termination 04291-60043 1
05 | Keysight | Accessories Catalog for Impedance Measurements - Catalog